US3676667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical projector device
Assignee: Individual
•
Filing: 1969-07-18
•
Granted: 1972-07-11
•
Expires: 1989-07-18
Abstract
Abstract An optical projector device in which light is collected from substantially 4 pi steradians by means of two reflector systems. One system comprises a tapering reflector, and the other system can include planar tapered, spherical, ellipsoidal, or cylindrical reflector elements which reflect light from the remaining solid angle towards the entrance window of the first system. The tapering reflector may have the general shape of a truncated cone, prism, or pyramid.
Inventors
- 👤 Pierre Malifaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:00
CPC Classifications
F; F21; F21V; F21V7/00; G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2066
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
89 words
Optical projector device adapted to give a projected flux with optimal yield and distribution of light and comprising a source of radiation, a reflective collecting optical system of concave type disposed about the source of radiation, and a tapered optical tunnel with internal reflecting sides tapered so as to cause divergence of an incident beam whose small section, known as input section, completes, in combination with said collecting optical system, total optical encompassment of said source, wherein said tapered mirror is designed in accordance with the following dimensional relationships:
Claim 2
Dependent Claim
89 words
Optical projector device adapted to give a projected flux with optimal yield and distribution of light and comprising a source of radiation, a reflective collecting optical system of concave type disposed about the source of radiation, and a tapered optical tunnel with internal reflecting sides tapered so as to cause divergence of an incident beam whose small section, known as input section, completes, in combination with said collecting optical system, total optical encompassment of said source, wherein said tapered mirror is designed in accordance with the following dimensional relationships:
Claim 3
Dependent Claim
102 words
Optical projector device as claimed in claim 1 wherein the tapered mirror is constituted by a bunch of tapered elementary mirrors whose axes are inclined in relation to the general optical axis, in such a fashion that all the exit faces inside the overall mirror constituted by the assembly of said elementary mirrors and wherein the peripheral zones of said exit faces join the corresponding lateral faces of the homologous elementary mirrors in a right section the average radial extension of which is larger than that of the right section in which is located the junction point between all the exit faces.
Claim 4
Dependent Claim
38 words
Optical projector device as claimed in claim 2 wherein the right section in which the peripheral zones of the exit faces join the corresponding lateral faces of the tapered elementary mirrors is determined by the following dimensional relationships:
Claim 5
Dependent Claim
35 words
Optical projector device as claimed in claim 2, wherein the right section in which is located the junction point between all the exit faces of the tapered elementary mirrors is determined by the following relationships:
Claim 6
Dependent Claim
38 words
Optical projector device as claimed in claim 2, wherein the right section in which the peripheral zones of the exit faces join the corresponding lateral faces of the tapered elementary mirrors is determined by the following dimensional relationships:
Claim 7
Dependent Claim
36 words
Optical projector device as claimed in claim 5, wherein the right section in which is situated the junction point of all the exit faces of the tapered elementary mirrors is determined by the following dimensional relationships:
Claim 8
Dependent Claim
50 words
Optical projector device as claimed in claim 1, wherein the large section of the tapered mirror has a contour which is homothetic in relation to the orthogonal projection of the contour of the zone which is to be illuminated, onto a plane perpendicular to the axis of the illuminating beam.
Claim 9
Dependent Claim
39 words
Optical projector device as claimed in 1, wherein at least the part of the tapered mirror and the emissive element of the radiation source are located in the same enclosure constituted by the selfsame enclosure of the radiation source.
Claim 10
Dependent Claim
57 words
Optical projector device as claimed in claim 8, wherein the tapered mirror is sub-divided into two sections, that containing the small section being situated inside the selfsame enclosure which contains the radiation source, and that containing the large section being situated externally of said enclosure and being optically connected to the first portion of said tapered mirror.
References Cited (Backward Citations)
US1804651A
Cited
US1891846A
Cited
US2584697A
Cited
US2689908A
Cited
US2945958A
Cited
US3152765A
Cited
US3437804A
Cited
US3318184A
Cited
US3383540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |